Description: The use of float water level floating principle control the inlet and outlet water switch, to achieve a constant water level effect, keeps enough water and water Rubber washer ensures a tight, leak free kit; adjustable arm with over 180 degrees of adjustment range. Works great for water trough, humidifier, fountain, aquarium, pond, chicken/dog/horse/cattle waterer, etc. Good performance of corrosion resistance and anti-deformation; Achieve the accurate installation of water level, environmental protection, no rust. Significantly save more than 30% of the water when animals drinking, reduce the sewage discharge pressure. Rubber washer ensures a tight, adjustable arm with over 180 degrees of adjustment range; PVC screw for adjustable arm prevents rust and oxidation. Specification: Material: Plastic Size: Thread diameter 20mm/0.79inch; length 160mm/6.30inch Package Includes: 1 Piece Plastic Water Level Float Valve Ball For Water Tank Humidifier Air Cooler